VA (Low Void Aerospace) Carbon Fiber. This material has the highest quality, smallest voids and best consistency of any carbon fiber sheet we've ever sold. The key to the quality is how the carbon fiber sheets are made. LVA is made on a press that generates 1,800 tons of pressure (3,600,000 pounds). The high pressure compresses each layer to .007" thick. Most carbon fiber sheet is made using the vacuum bagging process. The layers are stacked and a bag is put over the sheets. Vacuum is applied and atmospheric pressure presses the carbon fiber sheets together. Some manufacturers place the vacuum bag in an autoclave and apply 50-400 pounds of pressure. The vacuum bag process is not as good as a high pressure press at removing voids.